Plug connecter



' provide a Patented Nov. 3, 1931.

- UNITED STATES PATENT OFFICE aair w. amount, or Los means, 0

110mm, AssIeNon 'ro RAY w. scor'r AND mm! L. TWINING, A OOPABTNERSHII DOING BUSINESS AS TWINING-SCOTT, 0] LOS ANGELES, CALIFORNIA PLUG connnc'rnn "Application and au ust 22, 1928. Serial No. 301,327.

This invention relates to electrical connection devices, and especially to separab1e connecters that are adapted to carry a considerable amount of current. Such plug connecters are used for example in studios where electric lights of considerable power are needed, as in the taking of motion pictures.

It is one of the objects of my invention to provide a simple and convementdev ce of this character, and especially one that can be manufactured inexpensive y.

It is another object of my inventionto provide a pin connecter of large amperage that can be easi y manipulated.

My invention possesses many other advantages, and has. other objects which-may be made more easily apparent froma consideration of several embodiments of my invention. For this purpose I have shown a few forms in the drawings accompanying and forming part of the present specification. I shall now proceed to describe these forms in detail, which illustrates the general principles of my invention; but it is to be understood that this detailed description is not to be taken in a limiting sense, since the scope of my invention is best defined by the appended claims. 7

Referring to the drawings:

Figure 1 1s a side view of a plug connector embodying my invention;

Fig. 2 is a to plan view thereof;

Fig. 3 is a si e view of a slightly different form of the connecter, shown as engaged in a socket;

Fig. 4 isan enlarged detail sectional view, taken along plane 44 of Fig. 2; and

Fig. 5 is a sectional view taken along plane 5-5 of Fig. 1.

Referrin to the form shown in Fig. 1, I ody 11 of insulation material, such as hard rubber, phenolic condensation product or fibre. This body is in the form of a comparativel thick member of uniform thickness, as shov i in Fig. 2. It carries the contact strips 12, 13 atits top and bottom surfaces, which are shown as flat. Each strip has a bent in portion 14 that serves to provide a nicely rounded surface 15 at theactive end of the contact strips; and. these bent in portions are, in this instance, shown as accommodated in the concavity 16 formed at the end of the body 11.

- The turned in portions 14 are useful to limit outward movement of these conductors from the contiguous surfaces of the body 11..

It is to be noted that these conductors are. v

spaced slightly away from the bod 11 'so that they can be sprung toward eac other, to fit snugly into the cooperating socket parts 17 (Fig. 3).

Body 11 has formed therewith a handle accommodated. The surfaces 20 extend 0on siderably beyond the width of body, 11, -t0

into the form stop wings. When inserted corresponding socket 17 as shown in Fig'. 3, these wings limit the inward movement by engaging the outer edges of the socket 17,

In order to confinethe conductor, strips 12, 13 on body 11, these strips can have their ends accommodated in grooves 18 :19 shown as a can; tinuation of surfaces 20; thus these grooves,

as having one side thereof forme are located at the base of surfaces 20. The strips can be bent inwardly to fit. these grooves. Or, as shown in the modifi Fig. 3, the grooves can be formed with one of their surfaces as a continuation' of the slanting surface 23 on body 11 Injthat case,

theends of conductors 12, 13, need not ,be bent up. This slot arrangement efi'ectively anchors the conductors in place, es ecially as the fit in the slots is made purpose ytight.

Connections to the. contact stripslfi? and 13 are provided by the aid of screws 24 that are threaded into those portions of strips 12 and 13 that overlie surfaces 23. In accommodate the inwardly pro 'ecting end of these screws, body 11 is rovi 25, 26 which open into aces 23, and which can be easily formed by first drilling the body before it is cut at surface 23, the cut cation of.

order to ed with slotsthen passing through the drilled hole. These conductor. Thus even V from the foregoing.

ternal surfaces, a pairof drilled holes, as shown most clearly in Fig. 2, do not extend all the way through the block or body 11, but 'ust far enough to space the projecting end 0 screw 24 at the center of surface 23.

As shown most clearly in Fig. 4, the lower surface of the conductors 12, 13 where the screw 24 pro'ects through, has a burr 27 thereon, formed by tapping the hole through the before screw 24: is inserted in the conductor, there is a projection at the lower side thereof, which when positioned in slots 25, 26, locks the conductors against movement along the surface 23. 4

Lateral movement, across the width of body 11 is also prevented by the manner in whic the leads are brought to screws 24.. In the present instance, I show a twin conductor cable 28 fastened into theslot 29 in handle 21, as by clamps 30 fitting into a depression 31 in the handle. One conductor 32, properly insulated, extends through an aperture 33 that extends between slot 29 and surface 20. It is connected to the screw 24 where it emerges at the face 20. The other conductor 34 likewise extends through a similar aperture 35 and is connected at its free end to its corresponding screw 24.

The manner of use of the plug is evident The contacts 12, -13, being fastened only at their inner ends, can readily be flexed as body 11 is inserted into a socket 17 to form a tight connection therein. There are very few parts for the entire plug, and it can be'assembled quickly and without the need of any tools.

I claim:

1. In a contact device, a body of insulation material, said body having a pair, of exmetallic contact strips, overlying and normally spaced slight ly from said surfaces, means forming, a

oove connection for confining the con uctors against movement in one direction with respect to the body, and means confining the contact strips against movement in another direction.

2. In a contact device, a body of insulation material, said body having a pair of external surfaces, each surface having a slantmg portion,

said slanting portions converging toward the axis of the body, a contact strip contacting with each slanting portion and having its end engaging in a roove pening in the slanting portion, sai groove extending across the body, and a connection to each strip, said connection passing through an aperture in the body and thereby preventing lateral movement of the contact strips.

3. The combination as set forth in-claim 2, in which the contact strips have portions that parallel each other and spaced slightly from the external surfaces, so as to permit them to flex.

4. In a contact device, a body of insulationmaterial, and overlyingbut out ofcontact with opposed faces of the body, said body havin overhanging edges, and the strips each aving free bent up portions engaging said edges.

5. The combination as set forth in claim contact strips are adjacent that end thebent 4, in which the overlying fastened to the body only of the strip which is remote from "up portions.

6. In a contact device, a body of insulation material, said body having a handle portion, said handle portion having a pair of wing portions for limiting the movement of the device into a socket, said wingportions each having a slanting. surface, conductors fas- In testimony whereof I have hereunto set my hand.

RAY W. SCQTT.

a pair of contact strips 

